import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        useMaterial3: false,
        primarySwatch: Colors.yellow,
      ),
      home: Scaffold(
        appBar: AppBar(title: const Text("Flutter App")),
        body: MyHomePage(),
      ),
    );
  }
}

class MyHomePage extends StatelessWidget {

  List<String> list = [];

  MyHomePage({super.key}) {
    for (var i = 0; i < 20; i++) {
      list.add("第$i条数据");
    }
  }

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
        itemCount:list.length,
        itemBuilder: (context,index){
          return ListTile(
            title: Text(list[index]),
          );
        }
    );
  }
}